I've had prescription lens in my mask for years with no problems. I also have a lot of astigmatism..........and yes, you can get contacts to correct it (Soft Toric Lens or Gas Permeable Lens are the best options IMO). My decision was based on the costs of replacing the contacts. It's a
LOT cheaper to get the lens put in the mask than to replace the contacts (in my case). When I ordered my lens, I also had the color correction tint done. One thing about it, it's really easy to spot my mask on the dive boat. LOL
Also, it does make a difference underwater. Even on the boat (while waiting to DIVE, DIVE, DIVE) the tint works to help cut down on the glare. HeHeHe, an added bonus.
Sorry, didn't mean to start up any promo for the tint. Got a little side-tracked for a minute.
I agree about the downside to that option, which was mentioned earlier. It's easier if I keep my mask on until I can get back to my glasses. Lasik is on my list of things I want, but just not possible at this time. Until then, I'm happy with the results I've had with the RX added to my mask. With them at least I can tell what I'm looking at and don't have to rely on a buddies hand signals to let me know there is an eel or lobster right in front of me, then wait to get the pictures back to see what I missed seeing at the time.
As for price, having my RX put in my mask was less than it cost for my glasses. And it was definitely worth the price!!!